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Hassium vs Neptunium

Hassium
Neptunium
Neptunium vs Hassium


Periodic Table
Symbol
Hs  
Np  
Group Number
8  
10
3  
15
Period Number
7  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
54037579  
11
7439998  
99+
Space Group Name
-  
Pnma  
Space Group Number
166.00  
9
62.00  
14
Facts
Interesting Facts
  • Hassium metals rate of decay is very high.
  • Hassium metals 1st sample was synthesized through a nuclear reaction.
  
Neptunium was the first transuranium element to be discovered.  
Sources
Synthetically Produced  
Made by Bombarding Uranium with Neutrons, Ores of metals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Edwin McMillan and Philip H. Abelson  
Discovery
In 1984  
In 1940  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
-  
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Hassium metal are limited to research purpose only.
  
  • Currently known uses of Neptunium metal are limited to research purpose only.
  • Neptunium’s isotope neptunium-237 is used as a neutron detectors.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
-  
Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
640.00 °C  
99+
Boiling Point
0.00 °C  
99+
3,902.00 °C  
13
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silver  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
4.50  
10
6.00  
6
Brinell Hardness
230.00 MPa  
99+
622.00 MPa  
23
Vickers Hardness
2,450.00 MPa  
5
640.00 MPa  
23
Speed of Sound
2,760.00 m/s  
99+
2,260.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.30  
99+
Reflectivity
69.00 %  
14
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Hs  
Np  
Isotopes
  
  
Known Isotopes
7  
31
20  
19
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
1.36  
30
Sanderson Electronegativity
1.30  
25
1.36  
23
Allred Rochow Electronegativity
1.30  
25
1.22  
27
Mulliken-Jaffe Electronegativity
1.30  
33
1.36  
31
Allen Electronegativity
1.30  
40
1.36  
37
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
2.64  
25
Ionization Energies
  
  
1st Energy Level
733.30 kJ/mol  
26
604.50 kJ/mol  
99+
2nd Energy Level
1,756.00 kJ/mol  
25
1,128.00 kJ/mol  
99+
3rd Energy Level
2,827.00 kJ/mol  
37
1,997.00 kJ/mol  
99+
4th Energy Level
3,637.50 kJ/mol  
99+
3,242.00 kJ/mol  
99+
5th Energy Level
4,940.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
6th Energy Level
6,175.10 kJ/mol  
99+
5,785.00 kJ/mol  
99+
7th Energy level
7,535.50 kJ/mol  
32
6,040.00 kJ/mol  
99+
8th Energy Level
8,857.40 kJ/mol  
21
6,040.00 kJ/mol  
99+
9th Energy Level
5,400.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
10th Energy Level
6,100.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
11th Energy Level
6,100.00 kJ/mol  
99+
6,180.00 kJ/mol  
99+
12th Energy Level
3,500.00 kJ/mol  
99+
61,800.00 kJ/mol  
13
13th Energy Level
4,200.00 kJ/mol  
99+
6,180.00 kJ/mol  
40
14th Energy Level
1,124.00 kJ/mol  
99+
6,180.00 kJ/mol  
29
15th Energy Level
68,200.00 kJ/mol  
31
60,600.00 kJ/mol  
99+
16th Energy Level
32,800.00 kJ/mol  
99+
60,420.00 kJ/mol  
31
17th Energy Level
1,089.00 kJ/mol  
22
604.00 kJ/mol  
99+
18th Energy Level
3,300.00 kJ/mol  
99+
6,040.00 kJ/mol  
99+
19th Energy Level
1,086.50 kJ/mol  
19
604.50 kJ/mol  
99+
20th Energy Level
880.00 kJ/mol  
14
604.00 kJ/mol  
99+
21st Energy Level
1,086.00 kJ/mol  
30
6,040.00 kJ/mol  
17
22nd Energy Level
350.00 kJ/mol  
99+
604.00 kJ/mol  
40
23rd Energy Level
1,120.00 kJ/mol  
34
6,040.00 kJ/mol  
18
24th Energy Level
540.90 kJ/mol  
99+
604.50 kJ/mol  
99+
25th Energy Level
610.00 kJ/mol  
99+
604.00 kJ/mol  
99+
26th Energy Level
587.40 kJ/mol  
99+
604.00 kJ/mol  
99+
27th Energy Level
880.00 kJ/mol  
5
604.00 kJ/mol  
99+
28th Energy Level
840.00 kJ/mol  
14
604.00 kJ/mol  
99+
29th Energy Level
867.80 kJ/mol  
11
604.00 kJ/mol  
99+
30th Energy Level
0.00 kJ/mol  
99+
604.00 kJ/mol  
99+
Electrochemical Equivalent
3.00 g/amp-hr  
21
1.77 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
108  
10
93  
25
Electron Configuration
[Rn] 5f14 6d6 7s2  
[Rn] 5f4 6d1 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Orthorhombic (ORTH)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
ORTH-Crystal-Structure-of-Neptunium.jpg#100  
Atom
  
  
Number of Protons
108  
10
93  
25
Number of Neutrons
158  
7
144  
15
Number of Electrons
108  
10
93  
25
Radius of an Atom
  
  
Atomic Radius
126.00 pm  
99+
155.00 pm  
32
Covalent Radius
134.00 pm  
99+
190.00 pm  
18
Van der Waals Radius
0.00 pm  
99+
221.00 pm  
27
Atomic Weight
269.00 amu  
9
237.00 amu  
22
Atomic Volume
22.70 cm3/mol  
18
11.62 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Bohrium
  
Uranium
  
Next Element
Meitnerium
  
Plutonium
  
Valence Electron Potential
0.00 (-eV)  
99+
96.00 (-eV)  
9
Lattice Constant
-  
666.30 pm  
3
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.31  
99+
1.43  
99+
Mechanical
Density
  
  
Density At Room Temperature
40.70 g/cm3  
1
19.38 g/cm3  
14
Density When Liquid (at m.p.)
41.00 g/cm3  
1
20.25 g/cm3  
10
Tensile Strength
80.00 MPa  
29
125.00 MPa  
26
Viscosity
0.00  
27
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.11 (Pa)  
17
Elasticity properties
  
  
Shear Modulus
40.00 GPa  
19
5.60 GPa  
99+
Bulk Modulus
40.00 GPa  
38
180.00 GPa  
9
Young's Modulus
40.00 GPa  
99+
46.00 GPa  
99+
Poisson Ratio
0.34  
10
0.26  
22
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
41.00  
2
20.25  
15
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
8
0.00 H/m  
6
Susceptibility
0.00  
25
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
41.00 nΩ·m  
99+
1.22 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
63.20 kJ/mol  
19
118.60 kJ/mol  
6
Thermal
Specific Heat
0.13 J/(kg K)  
99+
0.12 J/(kg K)  
99+
Molar Heat Capacity
25.92 J/mol·K  
99+
29.46 J/mol·K  
10
Thermal Conductivity
0.00 W/m·K  
99+
6.30 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
913.00 K  
99+
Thermal Expansion
21.20 µm/(m·K)  
23
13.30 µm/(m·K)  
35
Enthalpy
  
  
Enthalpy of Vaporization
126.00 kJ/mol  
99+
336.00 kJ/mol  
39
Enthalpy of Fusion
-  
3.20 kJ/mol  
99+
Enthalpy of Atomization
-  
275.30 kJ/mol  
99+
Standard Molar Entropy
57.20 J/mol.K  
29
64.00 J/mol.K  
21
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